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…ld, 6th Edition''. Cornell University Press. Downloadable from Cornell Lab of Ornithology ]</ref> …

…do, O., Keith, A. & Raffaele, J.}}|any=1998 |títul=A Guide to the Birds of the West Indies |url=https://archive.org/details/isbn_9780691087368|editorial=P …

…/lifehistory Downy Woodpecker, Life History, All About Birds - Cornell Lab of Ornithology]. ''allaboutbirds.org''. Consultat el 23 de giner de 2014.</ref …y|nom=David Allen|enlaceautor=David Allen Sibley|títul=The Sibley Guide to Birds|any=2000|ubicació=Nova&nbsp;York|publicació=Alfred A. Knopf|isbn=978-0-679- …

…Life History| fechaacceso = 6 de novembre de 2010| obra = The Cornell Lab of Ornithology| urlarchivo = https://web.archive.org/web/20100725100152/http:/ …sal Thrasher | fechaacceso = 6 de novembre de 2010 | editorial = The Birds of North America}}</ref> …

…er Ostrich Vol. 32, Iss. 2, 2010</ref><ref>David Attenborough, The Life of Birds, Episode 8, 46 minutes 15 seconds ff</ref> * Ian Sinclair, Phil Hockey and Warwick Tarboton, ''SASOL Birds of Southern Africa'' (Struik 2002) ISBN 1-86872-721-1. …

…its in Hawaiian Islands.|publicació= Proceedings of the Biological Society of Washington|volum= 89|número= |pàgines= 247–258|editorial= |doi= |url= http: …tinct flightless ibis of Jamaica". ''Proceedings of the Biological Society of Washington'', '''92''': 23–27.</ref> Nous fòssils trobats de dos llocs, inc …

…ref>[http://news.nationalgeographic.com/news/2011/06/110610-highest-flying-birds-geese-himalaya-mountains-animals/ «Highest Flying Bird Found; Ca Scale Hima …

* 1942 ''Systematics and the Origin of Species''. Columbia University Press. New York. ISBN 0-674-86250-3 * 1953 con E G Linsley y R L Usinger. ''Methods and Principles of Systematica Zoology''. McGraw-Hill, New York. 328 pàgs. …

* Howland, Llewellyn (abril de 1955). «Howland Island, Its Birds and Rats, as Observed by a Certain Mr. Stetson in 1854». Vol. IX, PACIFIC… * Nguyen, Nam H. (23 de febrer de 2018). La evolución de The World Factbook 2018 en [[castellà]] …

…dian-journal-of-zoology_2003-07_81_7/page/1249 | revista=Canadian Journal of Zoology | volum =81 | número =7 | pàgines =1249—1256 |data=juliol de 200 Archiu:Rhinoceros Auklet RWD1.jpg|Alaska Siga Life Center, [[Seward (Alaska)]] …

[[Image:Canadian Rockies - the bear at Lake Louise.jpg|200px|thumb|[[Orso negre americà]]]] ….<ref>[http://www.eol.org/pages/328580 «Ursus maritimus»]. Encyclopedia of Life.</ref> Es mouen en un caminar pesat, recolzant tota la planta dels [[peu]]s …

…les femelles. Açò va ser demostrat en la série documental ''[[The Life of Birds]]'' de la [[BBC]]. …

…|any=2009 |títul=A higher-level taxonomy for hummingbirds |revista=Journal of Ornithology |issn=2193-7192|volum=150 |pàgines=155—165 |doi=10.1007/s10336- …agost de 2012.</ref><ref name="IMNH">[http://imnh.isu.edu/digitalatlas/bio/birds/swifts/cahu/cahu_inf.htm Calliope hummingbird Info]. ''Imnh.isu.edu.'' Cons …

…-news/the-original-thanksgiving-turkey-is-now-extinct/ |website=In Defense Of Animals |access-dona't=2023-08-10}}</ref> …st=Daniel Q.|author2=Ralph H. Smith|year=1971|title=The Forest Primeval in the Northeast&nbsp;– A Great Myth?|journal=Proceedings Annual Tall Timbers Fire …

…de Reims ["On ''G. edwardsii'' and ''R. heberti'' from the Lower Eocene of the Reims area"]|publicació=[[Els Comptes rendus de l'Académie dones sciences|C …c bird from the Lower Eocene of Wyoming." ''Buletin of the American Museum of Natural History, '''37'''(11): 307-354.</ref> #Espècimen fragmentarios adic …